Switch makefile owners to MK_OWNERS

Bug: 278167548
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:a0d6580902d9112812e298b40c4fed734698b114)
Merged-In: Iedd4b8df3b6e9491e6b669ebb0010c5e120ba9d7
Change-Id: Iedd4b8df3b6e9491e6b669ebb0010c5e120ba9d7
diff --git a/OWNERS b/OWNERS
index e434a1c..f5be82c 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,4 +1,4 @@
 per-file powerhint-*.json = jychen@google.com,jenhaochen@google.com,wvw@google.com,joaodias@google.com
 
 # per-file for Pixel device makefiles, see go/pixel-device-mk-owner-checklist for details.
-per-file *.mk,*/BoardConfig.mk=file:device/google/gs-common:main:/OWNERS
+per-file *.mk,*/BoardConfig.mk=file:device/google/gs-common:main:/MK_OWNERS